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COLORADO DEPARTMENT OF PUBLIC flF.91.77t AND ENVB20NM£M, Water Quality Control Division
<br />Rarionak -Page 2. Permit No. COG-SOOC~00
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<br />The federal effluentguidelines that govern dischargesfrom sand and gravel miningfacilities (40 CFR 436) control most surface runo„
<br />from mining facilities. However, there are some sources ofstormwater from these sires which are not addressed, such as roads and
<br />railroad lines, pond ouulopes, inactive loadauts, sites used for storage and maintenance of material handling equipment, etc.
<br />For sand and gravel operations, other mining and quarrying ojnanmetallic minerals except fuels, and for asphalt and concrete batch
<br />plane located at such facilities, this general permit will cover both the process water discharges and stormwater discharges. Process
<br />water discharges are addressed under Part IB of the permit; stormwater discharges are addressed under Pan I.C ojthe permit.
<br />This will eliminate the need for coverage under more than onepermitfor most such facilities. However, as discussed in Section V.A1.a
<br />of the Rationale, some facilities may wish to apply for an individual permit instead, in order to sake advantage of somefedera! effluent
<br />guidelines not included here. Additionally, as discussed in Section III B of the Rationale, the Water Quality Control Division of the
<br />Colorado Department ofPublic Health and Environment (the "Division') retains the authority to require any facility to be covered under
<br />an individual permit.
<br />III. COVERAGE UNDER THIS PERMIT
<br />A. Industrial Categories
<br />The types ojjacilities covered by this permit include all mining and quarrying ofnonmetallic minerals, exceptfuels. This is the
<br />description of Standard Industrial Classification (SIC) Code 14. Also, siormwa[erfrom asphalt andconcrete batch plane located
<br />at sand and gravel operations is included here, due to their similarity to the covered mines in pollution potential, and their
<br />function as an adjunct to the mine operations. (The definition of asphalt and concrete batch plants can include the use of
<br />rerycled asphalt or concrete.) The categories include: '
<br />S!C Code Industry Type
<br />SIC Code Industry Type
<br />14I Dimension stone 148 Nonmetallic minerals services, except fuels
<br />141 Crushed and broken stone (overburden removal, strip mining, etc.)
<br />144 Sand and gravel 149 Miscellaneous nonmetallic minerals, except
<br />/45 Clay, ceramic, and refractory minerals fuels (asbestos, gems, fill dirt pits,
<br />147 Chemical and fertilizer mineral mining graphite, gypsum, peat, pumice, talc, etc.)
<br />1951 Asphalt batch ptanu 3273 Concrete batch plane
<br />B. Exemptions for Small Municipalities
<br />The Intermoda! Surface Transportation Efficiency Act oj1991 Section 1068(c) added an exemption to thestormwater regulations
<br />for municipalities with less than 100, 000 populatio». The term "municipality" includes cities, towns, counties, special dutricu or
<br />any entity created by or pursuant ro State law.
<br />Starmwater discharges associated with industrial activity (except for airports, steam electric power plane, or uncontrolled
<br />sanitary landfills), that are owned or operated by a small municipality are not required to applyjororobtain a stormwaterpermit
<br />until March 10, 1003. This exemption is only for discharges of stormwater. (Note: This exempton does no[ apply to other,
<br />privately owned industries within the same small municipality.)
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<br />CERTIFICATION
<br />A. Permit Certifications
<br />This permit it made up of several pare, same of which do not apply to all permittees (i. e., while most facilities will require
<br />coverage under the stormwater section I C, many will not require coverage under the process water section I.B). Therefore, the
<br />individual certiftcatiort preparedfor each applicant will indicate whether that applicant must followPart IB afthepermit. In all
<br />cases (except as noted in Section ]II.C, above), Part I C must be followed. (In the absence of such indication from [he Division,
<br />the permiaee will be responsible for determining and then complying with the applicable sectiorss in Part I) In addition, all
<br />permirrees will be required to comply with Pan 1, subparts A, D, E and F, and all of Pan II of the permit.
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